4mm buzzer

Hello everyone, I'm looking for a way to make (or hell even buy) a very small buzzer that can be rectangular or cylindrical that is 4mm in diameter and can be up to 10 mm long.  I've searched on Digi Key for something this small, but most things are about 8mm in diameter and 4mm long.  I need something skinny and long, not short and fat. Does anyone have any experience with this? Thanks

Topic by SJBoard44   |  last reply


Circuit with Thermistor and buzzer?

How do I build a simple ciruit that will cause a buzzing sound when the temperature rapidily increases?

Question by Emmsie   |  last reply


Alarm Buzzer Driver? Answered

So I have removed a buzzer from an out of date smoke for fun use, but it doesn't work as expected.  I set up a driver circuit with a 555 and some resistors/capacitors.  I don't deal much with IC's or the 555 and haven't really bothered to learn to use them properly, but I took an LED flash circuit and vastly decreased the capacitance, upping the frequency drastically.  I have included an image of the circuit.  The 555 runs on 6 volts, the buzzer runs on 9 (the blue wires).  The volume was ok, but nowhere near expected levels and I wondered if it had to do with the higher than normal frequency.  I attached it to an arduino and ran the tone function from below audible to above it (whole frequency range) and the sound was very quiet, even using an npn transistor and 9 volts right off the battery hitting the buzzer.  As you can see, the buzzer has 3 leads, i only used two, but as with most 3 poll buzzers I assumed one was just for some form of feedback.  Any voltage in any direction across the three produces sound, so should I use all three, and if so how should I do so.  How would you recommend driving this buzzer?

Question by jj.inc   |  last reply


Advice for a buzzer element

Hello I am developing a small device which requires  a sound alarming. The idea of the device is to be attached to your phone for example and if you wonder where your phone is, the device will turn on the sound alarming in order to give you information for its location. So, I am searching for a buzzer element which: - consumes up to 3.6 V; - is small (diameter up to 20 - 25 mm) and thin of course; I decided to use a buzzer element similar to this one http://www.digikey.co.uk/product-detail/en/CEB-20D64/102-1126-ND/412385 but I am not sure if it will do the job. I am concerned about something else, I have a buzzer at home which produces sound of high frequency and when you close your eyes it is absolutely impossible to find out where the sound comes from. Can somebody help me, please? Thanks a lot!!!

Topic by paveltashev   |  last reply


Add a buzzer to a multimeter? Answered

Hello, is it possible to add a continuity check buzzer to this MAS830S mutimeter ? i would like to do like on this video but i cant find which resistor is the good one http://www.youtube.com/watch?v=ItqYUUjcwfk i don't care if the buzzer is inside or not thanks

Question by rastactivist   |  last reply


Buzzer for Hot Water with 10 min timer

Hi Team, I want to make a 220v buzzer with timer 10 min. My thought is to control my electricity bill by reducing  water heater usage. This buzzer will help me remind me that water heater is on for 10 min so that I can switch it off to save power. I know it is seemed to very easy for pro guys but very difficult for me. Please help me understand and make such buzzer with minimal budget. I need help to make this project. Kindly let me know how can I do it.

Topic by vindude5 


Cell phone buzzer modification? Answered

Is it possible to modify your phone or phone buzzer so it will vibrate a lot stronger as seen in this clip (skip the first 10 seconds).

Question by The MadScientist   |  last reply


Piezo buzzer won't work? Answered

I have a couple of Piezo buzzers that I bought from the Adafruit shop, but when I connect them to a power source, they don't buzz or make any noise... Am I doing something wrong? Or am I not doing something?  Heres the link to the buzzers I have: www.adafruit.com/index.php

Question by Zem   |  last reply


Piezo buzzer for LED flasher? Answered

I have built the flasher found here; https://www.instructables.com/id/LED-Flasher-automotive-or-motorcycle/ It works great with the LED turn signal bulbs on my bike I would like to hook up a piezo buzzer to the flasher that buzzes when either the right or left signal light is on (motorcycle flasher reminder buzzer). What would be the easiest way to do it? The flasher runs constantly when the key is on, only powering the turn signals when the turn switch is activated right or left. The buzzer won't work when hooked up to the B+ and load terminals like it was on the mechanical flasher with incandescent bulbs. I figure the problem is that the incandescent bulbs provided the ground for the buzzer though the filaments. Does this sound right? Thanks. Sorry about the long diatribe.

Question by pofarm   |  last reply


Buzzer for Gyser with 10 min timer

Hi Team,   I want to make a 220v buzzer with timer 10 min. My thought is to control my electricity bill by reducing  gyser usage. This buzzer will help me remind me that gyser is on for 10 min so that I can switch it off to save power. I know it is seemed to very easy for pro guys but very difficult for me. Please help me understand and make such buzzer with minimal budget.   I need help to make this project. Kindly let me know how can I do it.

Topic by vindude5   |  last reply


12 buzzer system for pub quiz?

Hi there, I own a pub and write what has become a very successful pub quiz with a twist.  We'd like to take it to the next level with the creation of a buzzer system for the teams.  It would need to be a buzzer system with at least 12 buttons (preferably more)  and I guess that it would best if it were a 'lock-out' system.  Is it possible to create a reliable and relatively inexpensive system?  we're UK based when it comes to parts buying.  Thanks in advance!

Question by barbint   |  last reply


How to silence the buzzer on my microwave oven?

No visible mechanical buzzer. Seems to be one of the little boxes that is attached to the circuit board. I know nothing about electronics. Don't want to kill myself or ruin the microwave, but that damn buzzer is driving everybody crazy! Help!

Question by melnel   |  last reply


How can I make a cheap set of sound/light buzzers that you would use in a trivia quiz to know who buzzed first?

I want to make a set of quiz buzzers so that, for example: someone asks a trivia question and two other people have a button each, both connected to a sound and/or light buzzer. The question is asked and as soon as one person hits their button and makes their buzzer and/or light come on, the other person's button then does nothing until the other person's light and/or buzzer has turned off. (Basically, only one light can be on at any one time) I have searched various sites on how to build one of these, but they never tell you how to make it like the title of it says, they just have links on the site that let you buy their product. If anyone has any idea on how to make this work, then I would appreciate any ideas you have. Thanks for your time.

Question by Jareadx   |  last reply


How can I get a loud alarm?

Ok so I need an alarm for my project, a very loud alarm. . . And I can't seem to get these dumb buzzer to output a decent sound. I have a lipo checker that uses these type of buzzers  and they are ear shattering. I tried putting the regular buzzers and the were no where near as loud. Also if I want to use the tone function on the arduino, how do i make the buzzer louder?

Topic by HavocRC   |  last reply


is there a buzzer of sorts that replicates the mosquito buzz ringtone on cell phones?

This buzz, if u dont know, is a very high pitch/ frequency which can get kind of annoying u probably know what the next step is..

Question by raykholo   |  last reply


How can I hook up an alarm / buzzer to a current meter? Answered

If the current is exceed the specified amperage, it will sound.

Question by indomgl   |  last reply


How can I make this buzzer buzz? It makes a small "ping" Answered

I got this buzzer from a surplus shop and I hooked up wires but only makes a small ping when I touch the wires to a battery terminal, How can I make it buzz?

Question by fusorx   |  last reply


Using Bluetooth to control simple components

I am undertaking a minor project with a friend and we need to build a bluetooth transmitter to be controlled by a mobile phone. All we need it to do is to give an electric signal on demand. Any expertise, components and suggestions people can share with us, I would be very grateful for. Merry Christmas! x

Topic by Martain   |  last reply


What are these electric components?

Hello guys I thought you could help me out with this a little bit. So I went to the dollar store looking for some. I'd like hack some to what I want, but first I need to know how it works! Um want to know what these things are on the board and what it is. So, I want to know what that black blob is on PCB and also that barrel shaped thing and why is the siren hooked up to that barrel. Thanks guys!

Topic by HavocRC   |  last reply


Fake Pokemon GO Pro

Hello! Right now the best practice to hunt pokemon is to just walk and if the phone vibrates, you look. Thant means you have to hold the phone in hand.  I had an idea for a DIY, but no way to execute it. Idea is simple: -motor vibrator from old phone -Arduino -BT module -battery Turn all above into a braclet for your hand  I owuld need an app or something that, whenever phone vibrates, it would send a command over bluetooth to arduino to vibrate. It would need to check for phone vibrate command as the app doesnt give a notification or annything.  Is the ambition too high ? Is this harder to execute than i tought ? 

Topic by compufreek   |  last reply


What is wrong with the program...? Answered

I am trying to make a quizbowl(jepoardy) buzzer system, and I am using an arduino.  I have a program that does a few buttons, and I can add more buttons by just adding more if else, but when I clear it( pin0 and pin3) you have to wait about a second to buzz in, otherwise it doesn't register.  Just a note: the buttons are set up so that I can use 6 pins and control 9 buttons.  It is hard to explain but the pins are setup so that two of the pins sense the current to correspond to the button pressed.  I don't know what else to add, I think it is that is doesn't register that the clear button is no longer pressed, but that might not be it.  Here is the program: const int pin0 = 14; const int pin1 = 15; const int pin2 = 16; const int pin3 = 17; const int pin4 = 18; const int pin5 = 19; const int led1 = 13; const int led2 = 12; const int led3 = 11; int pin0s = 0; int pin1s = 0; int pin2s = 0; int pin3s = 0; int pin4s = 0; int pin5s = 0; void setup() { pinMode(pin0, INPUT); pinMode(pin1, INPUT); pinMode(pin2, INPUT); pinMode(pin3, INPUT); pinMode(pin4, INPUT); pinMode(pin5, INPUT); pinMode(led1, OUTPUT); pinMode(led2, OUTPUT); pinMode(led3, OUTPUT); } void loop () {   pin0s = digitalRead(pin0);   pin1s = digitalRead(pin1);   pin2s = digitalRead(pin2);   pin3s = digitalRead(pin3);   pin4s = digitalRead(pin4);   pin5s = digitalRead(pin5);     if (pin1s == HIGH && pin3s == HIGH)   {     digitalWrite(led1, HIGH);     while(pin0s == LOW || pin3s == LOW)     {       pin0s = digitalRead(pin0);       pin3s = digitalRead(pin3);     }     digitalWrite(led1,LOW);     while(pin0s == HIGH || pin3s == HIGH)     {       pin0s = digitalRead(pin0);       pin1s = digitalRead(pin1);       pin2s = digitalRead(pin2);       pin3s = digitalRead(pin3);       pin4s = digitalRead(pin4);       pin5s = digitalRead(pin5);     }       pin0s = digitalRead(pin0);   pin1s = digitalRead(pin1);   pin2s = digitalRead(pin2);   pin3s = digitalRead(pin3);   pin4s = digitalRead(pin4);   pin5s = digitalRead(pin5);     }  else if(pin3s == HIGH && pin2s == HIGH)  {     digitalWrite(led2, HIGH);     while(pin0s == LOW || pin3s == LOW)     {       pin0s = digitalRead(pin0);       pin3s = digitalRead(pin3);     }     digitalWrite(led2,LOW);     while(pin0s == HIGH || pin3s == HIGH)     {       pin0s = digitalRead(pin0);       pin1s = digitalRead(pin1);       pin2s = digitalRead(pin2);       pin3s = digitalRead(pin3);       pin4s = digitalRead(pin4);       pin5s = digitalRead(pin5);     }       pin0s = digitalRead(pin0);   pin1s = digitalRead(pin1);   pin2s = digitalRead(pin2);   pin3s = digitalRead(pin3);   pin4s = digitalRead(pin4);   pin5s = digitalRead(pin5); } else if (pin0s == HIGH && pin4s == HIGH) {     digitalWrite(led3, HIGH);     while(pin0s == LOW || pin3s == LOW)     {       pin0s = digitalRead(pin0);       pin3s = digitalRead(pin3);     }     digitalWrite(led3,LOW);     while(pin0s == HIGH || pin3s == HIGH)     {       pin0s = digitalRead(pin0);       pin1s = digitalRead(pin1);       pin2s = digitalRead(pin2);       pin3s = digitalRead(pin3);       pin4s = digitalRead(pin4);       pin5s = digitalRead(pin5);     }       pin0s = digitalRead(pin0);   pin1s = digitalRead(pin1);   pin2s = digitalRead(pin2);   pin3s = digitalRead(pin3);   pin4s = digitalRead(pin4);   pin5s = digitalRead(pin5); }} Please help! Thanks in Advance!

Question by JaredsProjects   |  last reply


Could removing a buzzer break the circuit?

I have a safe and it has a really annoying beep each time you use it so I wanted to remove the buzzer. The buzzer is on the main circuit board for the safe and while I have no problem de-soldering it, could there be any way that the safe would fail to function if it no longer had the buzzer in the circuit?

Question by flybye22   |  last reply


HOW DO YOU BUILD A GAME SHOW BUZZER STAND?

need schematics on buzzer stand

Question by BANNERMAN   |  last reply


Quiz Buzzer Lockout System help needed

Hi all. my church has task us youth to design a quiz buzzer lockout system type of thing to be used for a bible quiz. so the host will ask a question and 8 people will try to be fist to press their button... the fastest button will lockout out all 7 other buttons so they wont buzz... after he answered then the host will press a reset switch and continue with the next question... i did a ton of research and always end up with arduino arduino arduino... and the instructions is all for 4 or so people and its not very clear to understand or easy to do. i know a bit of programming so that wont be a challenge. i love electronics so that wont be a problem. i just need a clear set of instructions to follow and some guidelines and parts to buy... (im 14 years old... )  the quiz is end of march. it for 8 people cause 8 youths of 8 different churches will compete.  if anyone could give me a plan or guide or point me in the right direction that would be super !!! i know im gonna need some wire... allot of wire... and an arduino... thanks in advance to all you wise folk :) oh btw i live in cape town...

Topic by moppyking   |  last reply


Looking to trigger a handheld "buzzer" using a motion detector, any advice?

Hey everyone! I am currently working on a project that would allow my employees to be alerted once somebody walks through our doors, without annoying anyone (so a bell is out of the question, haha). My idea is to have a motion detector above the door, and once someone walks through it, a handheld buzzer will go off (to alert my employees). I'm thinking that I'll need a PIR sensor, a vibration motor, possibly a micro-controller(?), and some kind of power source. Something I'm struggling with is finding a way to trigger the buzzer, without being physically connected to the PIR sensor. What do you guys think? P.S. Please excuse my lack off knowledge, as I'm more of a software guy ;)

Question by slader166   |  last reply


I need a circuit diagram for a simple piezoelectric audio buzzer and led light flasher in one handy circuit board?

 Hi, I am trying to build a simple circuit that has a piezo electric buzzer and an led light flasher that runs on a 9V battery. The idea is that, this circuit is a wearable (a necklace prototype) that acts as an alert system - the circuit needs to be compact. All I want for it to do is, with the flip of a switch, the buzzer sounds and the LED light flashes. I am a beginner when it comes to building circuits. Can some one please provide me with a circuit diagram? Thanks for your help!

Question by gbal   |  last reply


Would this schematic work?

Will this work? it's based on https://www.instructables.com/id/SCYCBXQFD80BUXI/Basically, what it should do, is when I aim the IR emitter (TV remote) at it, it'll go off for a few seconds. The goal is to hide it and piss off whoever is watching TV, and changing channels.

Topic by cvxdes   |  last reply


I need a wireless device that signals a light

I'm new to instructables, I ran across your web-site researching this project. I need to have a push button at one location in a warehouse that signals a light to come on when its pushed in another area of the warehouse A light would emit at the forktruck drivers station. I would also like a  buzzer to sound also. The distance is less than 200 ft. I would also like three buttons at alternate locations that when pushed would a light a different colored light.  This would signal the driver as to who wanted him. I was told we could not use the walkie talkie device and it needed to be wireless. I would like the buttons mounted on a magnet so I can hang on a metal machine.I was thinking maybe a wireless doorbell

Question by cabanna   |  last reply


How to use a nc switch to activate a buzzer when pressed Answered

Hi there i don't know if this is possible but, i want to be able to : have a buzzer come on when a nc switch is pressed, for example, i have an emergency stop switch which is nc, so when pressed the circuit is broken, i would like it so when i press the switch ( ie it breaks the contact ), it makes a buzzer sound and an led come on to notify that the emergency stop has been pressed, i am using 8 core Ethernet cable to connect the emergency stop switches so if i have a circuit in every switch , i can do the same in every stop switch with the cable i am using, i want a buzzer and an led in EVERY emergency stop switch, i will have 3 in total, is it just the case of wiring the circuit in the one emergency stop and connecting the leds and buzzers from the others in Parallel at the other stop switches ?, or do they have to be wiring in series ? i have got 6v and 12v buzzers and many value of resistors so the source voltage for powering them really wont be a problem, the biggest problem is building the circuit, because atm it is a nc switch so if i connected an led and buzzer, it would be connected all the while, i need to somehow use the nc switch to break a circuit but also use it as a no switch for the buzzer circuit, if this is possible please leave a comment and help if you can, i have looked on google but cant really find anything, thanks EDIT !!!! hi also ad an addon to the question, the nc switch will be switching 230v, so the live cable will be cut and put accros the nc contacts, will this still work with iceng circuit or is that a big nono ?

Question by shanecoley   |  last reply


How could I make a variable interval buzzer/vibrating device? Answered

I would like to make a small device, perhaps the size of 3-4 stacked half-dollars, that could be programmed to vibrate lightly at various intervals (like every minute or two minutes or 3.5 min, etc).  Could anyone help me with how I could make something like this? The size could vary, but I want it to be a discrete device that would only draw the attention of its user for a brief moment every interval (depending on how long the interval is programmed to be).  I am very new to doing anything with electronics, so I'd greatly appreciate any advice or guidance.

Question by Kazbachris   |  last reply


Buzzer and LED interfering with each other on an arduino? Answered

Hi, I recently got an arduino for Christmas and am experiencing a problem.  I am practicing using it with a piezo buzzer, push button, and a RGB LED.  I programmed it so that whenever the button was pushed, the LED turned green, and when it wasn't pushed, the LED turned RED.  It worked fine until I added the buzzer.  I modified the program so that the buzzer was on when the button was not pushed.  Once I did this, the buzzer turned on and green and red pin of the LED came on dimly making the LED orange when the button was not pushed, and when the button was pushed, the buzzer turned off and the LED lit up green like it was supposed to.  I wan't to know why the LED is orange instead of solid red.  Any help would be appreciated.  If you need more information let me know. Here is my sketch //#include const int RED_PIN = 9; const int GREEN_PIN = 10; const int BUTTON_PIN = 7; const int BUZZER_PIN = 6; //const int TRIGGER_PIN = 12, ECHO_PIN = 11; //NewPing sonar(TRIGGER_PIN, ECHO_PIN); void setup() {   pinMode (RED_PIN, OUTPUT);   pinMode (GREEN_PIN, OUTPUT);   pinMode (BUTTON_PIN, INPUT);   pinMode (BUZZER_PIN, OUTPUT); } void loop() {   if (digitalRead(BUTTON_PIN) == HIGH)   {     digitalWrite(GREEN_PIN, LOW);     digitalWrite(RED_PIN, HIGH);     analogWrite(BUZZER_PIN, 100);   }   else if (digitalRead(BUTTON_PIN) == LOW)   {     digitalWrite(RED_PIN, LOW);     digitalWrite(GREEN_PIN, HIGH);     analogWrite(BUZZER_PIN,0);   } }

Question by roboticarrow   |  last reply


Arduino knock sensor with a twist

Hey there! I live in a dorm and there's no preinstalled doorbell so i thought i'd do something funkier. I've used the stock Arduino Knock code and modified it a bit so agitating the piezo will make a connected buzzer beep. The problem is that while the entire setup is working, the buzzer itself is very very quiet. With a pure tone making script the buzzer will make a loud BEEEP, but combined with the knock code it's extremely quiet. I'm new to Arduino's so please bear with me when i show my code (most is copy/paste to fit): /* Knock Sensor      This sketch reads a piezo element to detect a knocking sound.    It reads an analog pin and compares the result to a set threshold.    If the result is greater than the threshold, it writes    "knock" to the serial port, and toggles the LED on pin 13.      The circuit:     * + connection of the piezo attached to analog in 0     * - connection of the piezo attached to ground     * 1-megohm resistor attached from analog in 0 to ground    http://www.arduino.cc/en/Tutorial/Knock       created 25 Mar 2007    by David Cuartielles    modified 30 Jun 2009    by Tom Igoe  */   // these constants won't change: int speakerPin = 9; int ledpin = 13; const int ledPin = 12;      // led connected to digital pin 13 const int knockSensor = 1;  // the piezo is connected to analog pin 0 const int threshold = 10;  // threshold value to decide when the detected sound is a knock or not // these variables will change: int sensorReading = 0;      // variable to store the value read from the sensor pin int ledState = LOW;         // variable used to store the last LED status, to toggle the light void setup() {  pinMode(ledPin, OUTPUT); // declare the ledPin as as OUTPUT } void loop() {   // read the sensor and store it in the variable sensorReading:   sensorReading = analogRead(knockSensor);        // if the sensor reading is greater than the threshold:   if (sensorReading >= threshold) {     // toggle the status of the ledPin:     ledState = !ledState;       // update the LED pin itself:            digitalWrite(ledPin, ledState);     buzz(9, 2500, 500); // buzz the buzzer on pin 4 at 2500Hz for 1000 milliseconds   delay(100);    }     // delay to avoid overloading the serial port buffer } void buzz(int targetPin, long frequency, long length) {   long delayValue = 1000000/frequency/2; // calculate the delay value between transitions   //// 1 second's worth of microseconds, divided by the frequency, then split in half since   //// there are two phases to each cycle   long numCycles = frequency * length/ 1000; // calculate the number of cycles for proper timing   //// multiply frequency, which is really cycles per second, by the number of seconds to   //// get the total number of cycles to produce  for (long i=0; i < numCycles; i++){ // for the calculated length of time...     digitalWrite(targetPin,HIGH); // write the buzzer pin high to push out the diaphram     delayMicroseconds(delayValue); // wait for the calculated delay value     digitalWrite(targetPin,LOW); // write the buzzer pin low to pull back the diaphram     delayMicroseconds(delayValue); // wait againf or the calculated delay value   } } If i get this working i'll see if i can make an instructable out of it (and make a "secret knock identifier"). I ended up using this code: [url]http://vimeo.com/groups/arduinoprojects/videos/1940394[/url] which works (code can be found by following the links) And it works! I'm still wondering what was wrong with my (pasted) code though.

Topic by Eirinn 


DC buzzer/noisemaker that doesn’t use a transistor?

I’ve got some nice homemade field phones I made out of old carbon microphone handsets.  I’ve currently got DC piezo buzzers for ringers (which have transistors in them). I want to them to be able to survive an EMP, so I don’t want to use transistors. Is there anything I can use for a DC buzzer/noisemaker that doesn’t need AC power, or a transistor?   The voltage of the phones is 1.5v - 3v dc    

Topic by instrucables360   |  last reply


Ring doorbell n/o quick short button press activate a push and hold buzzer for wharehouse

Existing buzzer in wharehouse need to connect to new ring type doorbell but I need to keep the buzzer tryed a new chime box wired inline, but it's not loud enough was hoping to be able to a circuit or device in line to run the buzzer for ten seconds or so when the short in the normally open bell button was pressed

Topic by john.ward   |  last reply


I want to make an wireless switch when pressed will give out sound from buzzer?

I couldn't find any place where i could find them in my place and it's for science expo so it has to be DIY model. My idea is that i attach the buzzer to car keys or something which is very small and gets lost every-time and when i press the wireless switch i will know where are the keys or my pen drive ... so u must have got the idea..So folks please help me before 18 February 2011 24:00 Hours IST(Indian Standard Time)

Question by msiddardha997   |  last reply


Variable frequency generator? Answered

I'm looking for a way to build a simple frequency generator that generates high and low frequencies. I was thinking of using a POT to control the frequency range. I looked for it all around but the search didn't help much.

Question by matokage   |  last reply


555 1 Hz pulse generator? Answered

Hi,I have a simple buzzer which I want to convert to an oscillating buzzer so as to obtain the sound similar to that of an automobile's reverse indicator.I've posted a schematic(borrowed from electroschematics.com) below.I intent to replace the LED with my buzzer and omit the resistor.I hope by building this circuit,to make my buzzer 'buzz'(or make noise) at an interval of 1 second(since its a 1 Hz pulse generator).Would the results be similar to my needs?

Question by Adarsh_tronix   |  last reply


what are the possible solutions when making a quiz buzzer?

At school we were asked to find the possible solutions of making a quiz buzzer and soon we will be asked to make it.

Question by Biyela   |  last reply



how can I take a picture using a webcam by pressing a external buzzer?

So this is the situation... if u press d buzzer or just a button, the webcam of ur computer will take a picture.. 

Question by notz022   |  last reply


Help needed with Wire Loop Game

Hello, I wish to make the Wire Loop Game for a childrens' fun-n-fair. But I wish to add a simple SCR/circuit so that the buzzer sounds continuously instead of momentarily, once the loop touches the other wire. Can someone please show me or direct me to a website with a simple SCR, which is easily available (in India since I'm from there) circuit that can do the job? Any help greatly appreciated! Thanks, Deboo

Topic by deboogeek 


Help needed for making the WIre Loop Game Answered

Hello, I wish to make the Wire Loop Game for a childrens' fun-n-fair. But I wish to add a simple SCR/circuit so that the buzzer sounds continuously instead of momentarily, once the loop touches the other wire. Can someone please show me or direct me to a website with a simple SCR circuit, which is easily available (in India since I'm from there) that can do the job? If a readily available transistor can do this job, that would be good too. Any help greatly appreciated! Thanks, Deboo

Question by deboogeek   |  last reply


How to make an oscilating relay circut? Answered

Can anybody tell me in detail, how you would go about making a relay oscilate? Please explain and give directions.

Question by tesla man   |  last reply


How can I build an door alarm that sends a signal wirelessly to buzzer maybe 30m away when the door is opened? Answered

I need to hear the front door open from quite a way away and I can't really run wires all the way. The signal would need to travel wirelessly from the front door of my business to the buzzer at the other end of the premises.I can't seem to buy a pre-made version nor a kit for this anywhere! Would there be a way I could use a kit with a reed switch ie magnetic sensor on the door but somehow wire it to a transmitter instead of a buzzer? Then I'd need a receiver connected to a buzzer I suppose.  I've no idea really where to start.

Question by Lydboots   |  last reply


How to set up a desired threshold voltage? Answered

Hi, What I need-A circuit which allows voltage which is greater than or equal to 3 volts "ONLY" to pass through and power a buzzer i.e,shouldn't allow theuzzer to be powered with a voltage lower than 3 volts. The details-I just finished a project which makes a buzzer sound at its final phase.But,yet another obstacle-A darlington pair first completes a circuit with a relay in it when the base of it receives positive current via a resistor.The relay is activated which in turn powers the buzzer with - ve 12 volts and this makes the buzzer sound as +ve 12 volts is already connected to the buzzer.But somehow the buzzer is making a feeble,rather irritating sound even before the relay is activated..and it is somehow getting powered with a stray 3 volt power due to a leakage,somewhere.I tried to trace the flaw but couldn't find it.What I have in mind is a circuit which will allow voltage greater than 3 volts only to pass through and power the buzzer,somewhat like the function of a zener diode.I kindly request your guidance in designing a circuit which has a threshold voltage of 3 volts and higher.(I'm thinking BC 547s,555 timers etc.).

Question by Adarsh_tronix   |  last reply


How can i recheck my connections?What are the general problems regarding Lcd displays?

I just need to know regarding the buzzer module ...I have been using buzzer instead of  a buzzer module.Is it fine? ..Although it works fine.And please let me know the general troubleshoots related to LCD displays .I think my circuit's working great except for the lcd part. I am done uploading the code.But the LCD doesn't show any temperature values.Please help me

Question by achyuth93   |  last reply


metal detector

​i want to make a metal detector using tda0161, when the detector detects the metal from a specific distance the buzzer sounds but as the metal comes near and near the buzzer sound increases!! so anyone guide me for this i want to use this with arduino and to interface it with matlab and want its code too!!

Question by mati ur rehman   |  last reply


How do I Amplify a Battery Alarm Clock Buzzer?

My little battery Casio alarm clock barely wakes me up. Can anybody tell me what I need to do in order to amplify the alarm, or which circuitry to add? Thanks so much!

Question by anddontcallmeshirley   |  last reply


Is there a way to have an electronic key on my cats collar so everytime she goes in my room a buzzer goes off ??

I was wondering if you could make an electronic key or something like that so when she crosses or enters the area a buzzer or alarm goes off so she runs away.

Question by jules15   |  last reply


Alarm using RTC.

Hi, I am new to arduino and RTC DS1307. I am trying to create an alarm using RTC and arduino. I have a buzzer that I have connected to arduinio and also I have connected RTC module to it. I am programming the arduino in such a way that whn the timer runs off, it produces a sound from the buzzer. I am trying to use Time.h and TimeAlarms.h libraries. I dnt know how can I make the timer buzz the buzzer.  This is the code I ve done so far.  #include #include "RTClib.h" #include #include ; RTC_DS1307 RTC; void setup () {     Serial.begin(57600);     pinMode(4, OUTPUT); // set a pin for buzzer output     Wire.begin();     RTC.begin();   if (! RTC.isrunning()) {     Serial.println("RTC is NOT running!");     // following line sets the RTC to the date & time this sketch was compiled     RTC.adjust(DateTime(__DATE__, __TIME__));   } } void loop () {       DateTime now = RTC.now();     Serial.print(now.year(), DEC);     Serial.print('/');     Serial.print(now.month(), DEC);     Serial.print('/');     Serial.print(now.day(), DEC);     Serial.print(' ');     Serial.print(now.hour(), DEC);     Serial.print(':');     Serial.print(now.minute(), DEC);     Serial.print(':');     Serial.print(now.second(), DEC);     Serial.println();     Serial.println();        delay(1000);             //Somthing sould come here to make the buzzer buzz     soundBuzzer(); //sounds the buzzer        buzz(4, 2500, 500); // buzz the buzzer on pin 4 at 2500Hz for 1000 milliseconds } // This is the function to make the buzzing void soundBuzzer(){   } //This is for the buzzer. It produces a beep. void buzz(int targetPin, long frequency, long length) {   long delayValue = 1000000/frequency/2; // calculate the delay value between transitions   //// 1 second's worth of microseconds, divided by the frequency, then split in half since   //// there are two phases to each cycle   long numCycles = frequency * length/ 1000; // calculate the number of cycles for proper timing   //// multiply frequency, which is really cycles per second, by the number of seconds to   //// get the total number of cycles to produce for (long i=0; i < numCycles; i++){ // for the calculated length of time...     digitalWrite(targetPin,HIGH); // write the buzzer pin high to push out the diaphram     delayMicroseconds(delayValue); // wait for the calculated delay value     digitalWrite(targetPin,LOW); // write the buzzer pin low to pull back the diaphram     delayMicroseconds(delayValue); // wait againf or the calculated delay value   } } I am really bad at programming so sorry for mistakes. But please I need help.

Topic by Bam Boy   |  last reply